Grill cover



FIG. 1 is a top perspective view of a grill cover showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

CLAIM The ornamental design for a grill cover, as shown and described.